Introduction: Nigella sativa has been reported to have anti-inflammatory and antioxidative properties. We aimed to investigate the effects of Nigella sativa oil extract on the high fat diet (HFD) fed animal model. Methods: Thirty male Sprague-Dawley rats were used. Four groups (n=7) were fed with high fat diet (HFD) rat pellet orally for 10 weeks. The rats with HFD groups were subsequently randomly divided again into 4 groups. One group was continued with HFD while the other 3 groups were continued with the HFD in addition to Nigella sativa oil extract treatment at three different concentrations (0.5, 1 and 1.5 ml/kg/day) for another 4 weeks. Blood biochemical analysis and histological assessment of liver were subsequently performed. Results: Animals fed with HFD had increased aspartate aminotransferase (AST), alkaline phosphatase (ALP), albumin, cholesterol/HDL ratio, triglyceride (TG) levels, but decreased globulin, albumin/globulin ratio and high density lipoprotein (HDL) levels. Meanwhile, HFD animals treated with Nigella sativa oil extract showed a significant increase in the globulin and HDL levels, but reduced ALP, albumin, cholesterol/HDL ratio and TG levels. Nigella sativa oil extract at the higher doses displayed much better effect. Histologically the liver in all groups exhibited micro vesicular steatosis. Conclusions: Nigella sativa oil extracts improve the dyslipidaemia in animal models with HFD.
Introduction: Non-alcoholic Steatohepatitis (NASH) is an emerging chronic liver disease with limited therapy available. Studies utilizing animal models induced with cholesterol diet ranging from 1-2% are hampered by inconsistent yield of NASH features. Therefore, we aimed to establish a NASH animal model utilizing 12% cholesterol diet (CD) and to investigate the effects of Tualang honey (TH) known for its anti-inflammatory and antioxidative properties in this model. Methods: Twenty-four Sprague-Dawley rats were divided into 2 groups (12% CD and standard diet) and were fed for 6 weeks. Following the establishment of NASH, the rats in the 12% CD group were subsequently divided into 3 groups. The first group was continued with only 12% CD. In the other 2 groups in addition to the 12% CD they were given TH treatment at different concentrations (1.2 and 2.4 g/kg/day) for 4 weeks. Blood biochemical analysis and histological assessment of liver were subsequently performed. Results: The liver histological sections of the rats fed with 12% CD showed macrovesicular steatosis, ballooning degeneration with lobular and portal inflammation. They also had increased serum alanine aminotransferase (ALT), total cholesterol (TC), low density lipoprotein cholesterol (LDL-C), fasting insulin, HOMA-IR and reduced high density lipoprotein cholesterol (HDL-C). Meanwhile, the TH treatment groups exhibited significant improvement in both the NASH grading and activity scores. The ALT, LDL-C, TC, triglyceride (TG), fasting insulin and HOMA-IR levels were reduced significantly. Conclusions: The 12% CD was able to induce NASH in the animal model. Tualang honey improved insulin sensitivity, dyslipidaemia, steatohepatitis.
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